In Bootstrap we are having containers to set the content automatically to center of the page for respective device width. The container is defined with .container , .container-fluid class in Bootstrap CSS.

Typography:

Usually we will set the background color by defining background-color:#fff; in body.Bootstrap sets basic global display and typography and links.

In bootstrap we are having some attributes to define typography for global display like @font-family-base, @font-size-base and @line-height-base. To display link color we are having @link-color attribute.

Usually we define heading tags as h1, h2, h3, h4,h5, h6. In bootstrap along with these tags we have also available .h1, .h2, .h3, .h4, .h5, .h6 classes. similarly we have small tag and .small class available to display small text along with the heading.